Function vdup_n_p16 

pub fn vdup_n_p16(value: u16) -> poly16x4_t

🔬This is a nightly-only experimental API. (stdarch_arm_neon_intrinsics #111800)

Available on (AArch64 or target_arch=arm64ec) and target feature neon and target feature v7 only.

Duplicate vector element to vector or scalar Arm’s documentation